Glass-drawing apparatus.



L. A. THORNBURG.

GLASS DRAWING APPARATUS. APPLICATION FILED JUNE 17, 1911.

1,1 24,823, Patented Jan. 12, 1915.

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WITNESSES INVENTOR s rare orrron.

IQITflGOLN rnonnsone, or Mortars, INDIANA, ASSIGNOR TO wmnow GLASSMAGHXNE COM?ANY, HEW! JERSEY.

F PITTSBURGH, PENNSYLVANIA, A CORPORATION OF GLASS-DRAV7ING APPARATUS.

Specification of'Letters Eatent.

Patented Jan. 12, 1915.

Application filed June 17, 1911. Serial No. 633,647.

r all whom it may concern '5- iniown that I, LINCOLN a resident ofMuncie, in the countyor Delem are and State of Indiana, have 111- renteda new and useful Improvement in Glass-Drawing Apparatus, of which thefollowing is a full, clear, and exact descript-ion, reference being badto the accompanying drawings, forming part of this specification, inwhich-- Figure l is vertical transverse sect on if my improvedapparatus; Fig. 2 1s a slde ation of the same. v invention relates tothe drawing of from pots or receptacles, and its ob ect is to provide animproved pot system which may be used either in single or double form.

in the drawings, in which I show a preferred form of my apparatus, 2representsa double pot bottom, preferably circular in form, and havingprojecting rims 3, on 0pposite sides, with projecting integral trunnionsl, l, which are preferably angular in cross section at their outer ends.The intermediate portions 5 of the trunnions are preferably circularwhere they project through vertical slots in the side walls 6, 6, of thefurnace chamber. The furnace 7 maybe of any desirable form, for example,square in cross section with outer steel or iron plates 8, inclosing thebrick or other refractory lining 9.

The topstone 10 has a large central hole with a depending circular ring11, these parts being preferably formed-in one in tegral piece of clay.The opening is preferably circular in form. The ring 11 and the rims ofthe pot bottom are preferably so related that the rims fitneatly andclosely about the depending ring to make a close joint and to cut offthe hot currents from the drawing point. The depending flange or ring 11is preferably so constructed that when in operative relation to the potbottom 2, the lower edge of said flange will fit inst the upper surfaceof said bottom nin the rims 3.

iolds are'preferably placed on the drical trunnions between the slottedrectory lining and the slotted furnace these shields having holes to fitthe indrical trunnions. The. polygonal end one of the trunnions itwithin correlanding sockets 13, secured to metal trunnions 14, whichrest within vertically slotted cured pin-ions 17, these pinions engagingI short racks 18, which slide within the bottom of the forked portionand are actuated by suitable connections, such as links 19, pivotallyconnected with levers 20, secured to a common shaft 21. The constructionof the operating mechanism is the same at both sides and a single handlever 22 may be used to rock the shaft and turn the pot on itstrunnions.

The vertical standards 16 extend through suitable guideways 23, and atthe lower end are connected by short links 2 f with levers 25, pivotedto the sides of the furnace'at 26. The links 24- are formed in two partswith a turn buckle connection between them, so that by turning thenut,-the link may be varied in length, thus adjusting one side relativeto the other, so that thepot will fit that the pot may be locked in anydesired position.

Into the well below the furnace projects a number of gas jets 32,adapted to melt the glass from the bottom face of the reversiblebot-tom.

In order to take the'weight of the shields off the pot trunnions, Ipreferably pro vide vertical supports 83, on the hearings, to which areadjustabl y secured hooked rods 34, engagin eyebolts 35, secured to thetops of the .liields. I

in using the appr ratus, the bottom is raised into the position shown inFig. 1, the molten glass is ladled' or otherwise fed into the ring ofthe topstone and rests on the top face of the bottom. The drawing isthen carried out in the usual way, and when completed, the pot bottom islowered, then turned around the depending ring of the topstone. Anotherportion of glass is then fed in and during the next drawin the glassremaining 'on the bottom face 1s melted 01f by the gas jets or by hotproducts of a regenerative furnace.

The advantages of my invention result from the use of a turning potbottom in connection with the separate-ring against which the bottomfits.

The pot bottom may be of single form, that is, with only one receivinbottom face; the rim on the bottom may t against the bottom of thedepending ring, and other changes may be made without departing from myinvention.

I claim I 1. Ihe combination with a. rotatable glass pot havinga'rim, ofa topstone having a depending flange which fits within said rim andextends to the bottom of the pot cavity, substantially. as described.

2. The combination with a rotatable glass pot having a rim, of atbpstone having a depending flange which fits within said rim,

together with leveling means for the pot to adjust it to properlyreceive said flange,

substantially as described.

3. The combination with a rotatable glass pot havingv a rim, of atopstone having a depending flange which fits within said rim andextends to the bottom of the pot cavity,

- together with means for verticallyseparatingflthepot and topstone,substantially as described, V

4. The combination with a rotary reversi tical movement of said bottom,said bottom having a relatively shallow pot forming cavitytherein, of atopstone having a de-- pending flange adapted to fit within said potcavity and form the sides of the pot;

substantially as described' '6. The combination with a pot bottommounted for rotary and also for vertical movement, and having arelatively'shallow pot forming cavity in both its upper and its lowersurface, said cavities being surrounded by a shallow ri;n,'of a topstonehaving a depending flange adapted to fit within either of said rims, andto cooperate with the pot bottom to form-a complete pot in either of thereVersed positions of said bottom; substantially as described.

In testimony whereof, I have hereunto set my hand.

his LINCOLN A. X THORNBURG.

' mar Witnesses:

JoHN F. Mnnnnrrn, CARRIE F. MoDnnMo'r'r.

